Inboard railway truck



April 22, 1952 J. c. SETTLES ET AL 2,594,079"

INBOARD RAILWAY TRUCK Filed July 15, 1947 9 Sheets-Sheet l 3nventozlz$J. G. SETTLES BB L.E. FURNISS,

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April 1952 J. c. SETTLES ET AL 2,594,079

INBOARD RAILWAY TRUCK Clttorneg April 22, 1952 J. C. SETTLES ET ALINBOARD RAILWAY TRUCK 9 Sheets-Sheet 4 Filed July 15, 1947 3nventor6 8ES us m U F. G E i L April 22, 1952 J. c. SETTLES ET AL 2,594,079

INBOARD RAILWAY TRUCK Filed July 15, 1947 9 Sheets-Sheet 5 ISnventorb J.Cl SETTLES, L. E.FURNISS,

Gttorneg April 22, 1952 J. c. SETTLES ETAL INBOARD RAILWAY TRUCK 9Sheets-Sheet 6 Filed July 15, 1947 lSnnemton J. 0. SE TTLES L.E.FURNISS,

April 22, 1952 J. c. SETTLES ET AL INBOARD. RAILWAY TRUCK 9 Sheets-Sheet'7 Filed July 15, 1947 l'mnentorb J. c. SEITTLES L.E.FURN1SS, M a.

aomeg April 22, 1952 J. c. SETTLES ET AL 2,594,079

INBOARD'RAILWAY TRUCK Filed July 15, 1947 9 Sheets-Sheet 8 Q 4 it 92 LLZhwentor J. c. SETTL'ES, L. E. FURNISS,

6. aw aflorneg April 22 1952 J. c. SETTLES ET AL 2,594,079

INBOARD RAILWAY TRUCK Filed July 15, 1947 9 Sheets-Sheet 9 J. c.SETTLES, n 4 L.E.FURNIS S,

MC: 6% attorney Patented Apr. 22, 1952 INBOARD RAILWAY TRUCK James C.Settles, Columbus, and Loree Elwyn Furniss, Groveport, Ohio, assignorsto The Buckeye Steel Castings-Company, Columbus,

Ohio

Application' July 15, 1947, 1 Serial No. 761,038

23 Claims. (01. 105-197) This invention relates to railway trucks andmore particularly to inboard railway cartrucks.

One of the objects of the invention is to provide a truck of this typein which the side frames are arranged for standard type brakes with thebrake beams passing under inclined tension members of the frames.

Another object is to supply a truck of this character in which each sideframe has a guide opening in the top thereof to accommodate an upwardlyprojecting side bearing table of' the bolster. I

A still furtherobject is to furnish in such a truck, a bolster havingateach end portion thereof, an upwardly projecting side bearing tablewhich extends through and is guided by the side frame top member, and isprovided with oppositely disposed spring pressed friction wedgesdesigned to engage the bolster guide columns of the side frame, fordamping movement of the bolster.

Another object is to provide a truck of this type in which the center ofgravity of the bolster supporting spring group at each side of the truckis off-set outwardly from the longitudinal center line of the sideframes and journals at that side of the truck, the spring groups beingsupported by a spring plank which connects the opposed side frames andextends outwardly beyond such frames to act as a beam.

With these objects in View, one specific embodiment of the inventionwill be described for the purpose of making the invention clear and-forillustrating and defining the mannerin which the invention maybe-carried out; The invention generally will be defined in the claimsfrom which other objects of the invention may be ascertained. l

Reference is had to the accompanying drawings, in which: g a

Fig. 1 is a fragmentary side elevationalview of our improved truck withcertain parts omitted. to facilitate illustration.

Fig, 2 is a transverse vertical sectional view taken on the line 2--2 ofFig. 1 and illustrating half of the truck, with parts omitted tofacilitate illustration. v

Fig. 3 is a half fragmentary top .plan'view of the truck with certainparts omitted, v l I i Fig. 4 is a diagrammatic top plan view of one ofthe bolster supporting spring groups.

5 is an enlarged side elevation of a half of one of the side frames. IFig. 6 is a transverse sectional view of a detail of the same taken. onthe line .t-EofFig. 5.

Fig. 7 is a top plan view of the structure shown in Fig. 5.

Fig. 8 is a transverse vertical sectional view taken through the medialportion of the side frame.

Fig. 9 is a sectional view the line 99 of Fig. 7.

Fig. 10 is a side elevation of one-half of the bolster.

Fig. 11 is an end view of the bolster.

Fig. 12 is a top plan view of the structure illus of a detail taken ontrated in Fig. 10.

Fig. 13 is a top plan view of one-half of the spring plank.

Fig. 14 is a vertical sectional view of the same taken on the line l4-|4of Fig. 13.

Fig 15 is an end view of the spring plank.

Fig. 16 is a side elevation of a portion of the bolster and showing oneof the friction wedges positioned in a pocket thereof.

Fig. 1'7 is a vertical sectional view taken on the line I1-l! of Fig.16, but illustrating only onehalf of the bolster and one of the frictionwedges, and the pocket which receives the same.

Fig. 18 is a rear elevation of one of the friction wedges.

Fig. 19 is a side elevation of one of such wedges.

Fig. 20 is a bottom plan view of the wedge.

Referring to Figs. 1 to 4, inclusive, 2| designates wheels, the wheelsupporting axles 22 being journalled in anti-friction bearings 23. Thebearings support side frames 24 arranged inwardly of the wheels and eachside frame has a bolster openingv25 for the reception of a spring plank28, the end portions of which rest on the top 21 of the spring seats 28of the side frames and are interlocked therewith by any suitable meanssuch as lugs 29 projecting downwardly from the spring plank intoopenings 30 in the tops of the spring seats.

Each end portion of the spring plank supports a group of springs 3!(preferably of the long travel. type) arranged as illustrated in Fig. 4,so that the center of pressure 32 of each spring group is positionedoutwardly of the longitudinal center line 33 of the side frame at thatside of thetruck in order to increase the lateral stability of thetruck. j'

.As is customary, the springs support a bolster 34, and it will be notedfrom Fig. 2, that the bolster and spring plank at each side of the truckprojects outwardly beyond the side frame at that side of the truck. Inaccordance with the presentinvention, each end portion of the bolster isprovided with a side bearing table 35 that projects upwardly through aguide opening 36, offset outwardly in the top of the side frame at thatside of the truck. Each side bearing table is provided at opposite sidesthereof with pockets or cavities 31 for the reception of friction wedgesor shoes 38 resting on springs 39 (Fig. 17), within the pockets andurged by the springs toward Wear plates 46 secured to the bolster guidecolumns M which confront the wedges.

Referring now to the details of construction, it will be noted that eachside frame (Figs. -9) consists of a one-piece casting, symmetrical aboutthe transverse center line of the truck, and each end of the frame isprovided with a pedestal opening 32 for the reception of theanti-friction bearing or roller bearing journal box 23, shown in Fig. l.The inclined tension members 43 of the side frame are each preferablyU-shaped in cross-section, having a bottom web 44 which extends from thetop 45 ofthe pedestal opening to the medial portion of the adjacentbolster guide columns 6i. From the point where the web joins suchcolumn, it extends diagonally downward across the lower portion of thecolumn, as indicated at 46 (Fig. 5), and merges with the top 2'! of thespring seat member, which is preferably box-shaped in cross-section(Fig. 8).

As the inner end of each inclined tension member 43 is raised above itsusual position to approximately midway the height of the column 4|, itwill permit a standard brake beam 41 (only partially shown in Fig. 1) topass under each side frame for applying brake shoes 48 to the wheels.The remainder of the brake mechanism may also consist of the usualstandard arrangement of levers, rods, and. associated parts.

Each bolster guide column 4| is preferably provided with a pair ofspaced side lugs 49 and a bottom lug 56 for positioning one of thevertical wear plates 46, against which one of the friction wedges 38bears. Each wear plate may be securedto a column by welding or any othersuitable means.

Over the bolster opening, the top member of the side frame (Fig. 8)consists of an outer portion 5| and an inner portion 52 which portionsform the outer and inner walls, respectively, defining the opening 36for accommodation of the side bearing table 35 at the side of the truck.The outer portion 5| is formed as a relatively shallow recumbentchannel, and the inner portion 52 is formed as a relatively deeprecumbent channel. The top member of the side frame is the only portionof the frame proper which is not symmetrical about the center line ofthe journals.

With reference to the specific construction of the bolster, it will benoted from Figs. to 12, that the bolster proper is also a one-piececasting, symmetrical about both its transverse and longitudinal centerlines. Due to the inboard design of the truck, the bolster is muchshorter in span than the usual bolsters of outboard trucks. Asseeninelevation 1 (Fig. 10), the bolster has a relatively shallow endportion 53 positioned about midway the height thereof and this enablesthe bolster to be employed with the long travel springs 3! which supportthe bolster on the spring plank. The bolster also has a relatively deepmedially portion 54 to accommodate a large opening 55 through thebolster, to permit the use of the usual "rods through type of standardbrakes, These proportions are dictated by general truck conditions whichare also found in outboard trucks and it is believed that they are novelin combination with the upstanding side seat 58 at the bottom of eachpocket for supporting the wedge spring 39. Each friction wedge 36, asbest illustrated in Figs. 18 to 20, has a vertical friction surface 59which bears against the wear plate on the side frame column 4!, aslightly crowned inclined surface 57, mentioned above, and a horizontalspring seat surface 60 which rests upon the top of the spring 39. Theseelements of the wedge are integrally formed and are reinforced by anovel arrangement of ribs 6|, 62 and :63, which adequately strengthenthe friction wedge and also allow sufficient space for friction spring39. Holes 64 are provided in the lower ends of the tails of the wedgesand are arranged to, align with holes 65 (Fig. 17) in the bolster, forthe reception of a retaining pin (not shown), used in holding the wedgespring 39 under compression when it is desired to connect or disconnectthe bolster from a side frame. It will be understood that the frictiondamping devices thus provided function to damp movements of the bolsterrelatively to the side frames.

The spring plank is also believed to be of novel construction, and asshown in Figs. 13 to 15, it is symmetrical about its center line. Due tothe fact that the center of spring pressure 32 (Fig. 4) lies outwardlyof the truck, beyond the center line 33 of the supporting side frame,this spring plank is subjected to greater bending action than is usualin a spring plank for an outboard truck in which the center of pressureof the bolster supporting spring group coincides with the center line ofthe supporting side frame. For this reason, it is more economical toform the spring plank as a casting in which the strength at the varioussections along its length can be varied to correspond with the bendingaction rather than to use the usual uniform section rolled steelchannel. As illustrated, the plank has an upstanding marginal flange 66of varying height, topped-by a bead 6'! also of varying height andthickness. The bottom plate 68 of the plank is provided with integralupstanding spring positioning lugs 63 and serves as a seat for thebolster supporting. coil-s 3|.

From the foregoing, it is believed the construction, operation andadvantages of the improved truck may be readily understood, and we tailsdisclosed without departing from the spirit of the invention, asexpressed in the following claims. 7

What we claim and desire to secure by Letters Patent is:

1. railway truck comprising opposed, wheelsupported side frames, eachside frame having a bolster opening and a second opening in its topabove. the bolster opening, a bolster supported by the side frames andhaving its ends extending into the bolster openings, upstanding sidebearing-tables arranged on the bolster and extending through said secondopenings, and damping means mounted in the bolster at the places wherethe side bearing tables are located and cooperating with the side framesto damp relative movement between the bolster and side frames.

2. A railway truck comprising opposed, wheelsupported side frames, eachside frame having a bolster opening and a second opening in its topabove the bolster opening, a bolster supported by the side frames andhaving its ends extending into the bolster opening, upstanding sidebearing table arranged on the bolster and extending through said secondopenings, and damping means mounted in the bolster at the places wherethe side bearing tables are located and cooperating with the side framesto damp relative movement between the bolster and side frames, saiddamping means including inclined surfaces within each side bearingtable, wedge shoes having inclined surfaces movably engaging thefirstmentioned inclined surfaces, and springs carried by the bolster andengaging the Wedge shoes.

3. A railway truck comprising opposed, wheelsupported s'ide frames, eachside frame having a bolster opening and a second opening in its topabove the bolster opening, a bolster supported by the side frames andhaving its ends extending into the bolster openings, upstanding sidebearing tables arranged on the bolster and extending through said secondopenings, and damping means mounted in the bolster at the places wherethe side bearing tables are located and cooperating with the side framesto damp relative movement between the bolster and side frames, saiddamping means including pockets arranged in the bolster and side bearingtables, inclined surfaces within the pockets, wedge shoes havinginclined surfaces slidably engaging the first-mentioned inclinedsurfaces, and springs supported by the bolster for urging the wedgeshoes into engagement with the side frames.

4. A railway truck comprising opposed, wheelsupported side frames, theside frames being arranged at the inboard sides of the wheels and eachside frame having a bolster opening and a second opening in its topabove the bolster opening, a bolster supported by the side frames andhaving its ends extending into the bolster opensupported side frames,the side frames being ar- P ranged at the inboard sides of the wheelsand each side frame having oppositely disposed bolster guide columnsarranged at opposite sides of a bolster opening, each side frame havinga second opening in its top positioned between the columns, a bolstersupported by the side frames and having its ends extending into thebolster openings, upstanding side bearing tables arranged on the bolsterand extending through said second openings, and damping means mounted inthe bolster at the places where the side hearing tables are located andcooperating with said guide columns to damp relative movement betweenthe bolster and side frames.

6. A railway truck comprising opposed, wheelsupported side frames, theside frames being a"- ranged at the inboard sides of the wheels and eachside frame having oppositely disposed bolster guide columns arranged atopposite sides of a bolster opening,'each side frame having a secondopening in its top positioned between the columns, a bolster supportedby the side frames and having its ends extending into the bolsteropenings, upstanding side bearing tables arranged on the bolster andextending through said second openings, and damping means mounted in thebolster at the places where the side bearing tables are located andcooperating with said guide columns to damp relative movement betweenthe bolster and side frames, said damping means comprising converginginclined surfaces arranged in one of the side bearing tables, wedgeshoes having inclined surfaces slidably engaging the first-mentionedinclined surfaces, and springs carried by the bolster for urging saidshoes into engagement with the columns of one of said side frames.

7. A railway truck comprising opposed, wheelsupported side frames, eachside frame having a bolster opening and a second opening in its topabove the bolster opening, a bolster supported by the side frames andhaving its ends extending into the bolster openings, upstanding sidehearing tables arranged on the bolster and extending through said secondopenings, damping means mounted in the bolster at the places where theside bearing tables are located and cooperating with the side frames todamp relative move: ment between the bolster and side frames, saiddamping means comprising converging inclined surfaces arranged in one ofthe side bearing tables, Wedge shoes having inclined surfaces slidablyengaging the first-mentioned inclined surfaces, and springs supported-bythe bolster and bearing against the wedge shoes for moving them intoengagement with the inclined surfaces of the side bearing table.

8. A railway truck comprising opposed, wheelsupported side frames, eachside frame having a bolster opening and a second opening in its topabove the bolster opening, a bolster supported by the side frames andhaving its ends extending into the bolster openings, upstanding sidebearing tables arranged on the bolster and ex.- tending through saidsecond openings, damping means mounted in the bolster at the placeswhere the side bearing tables are located and cooperating with the sideframes to damp relative movement between the bolster and side frames,said damping means including pockets arranged in opposite sides of thebolster and in one of said side bearing tables, converging inclinedsurfaces arranged in the pockets, wedge shoes having inclined facesslidably engaging the first-mentioned inclined surfaces, and springssupported by the bolster and cooperating with the wedge shoes to movethem against said inclined sur faces and in opposite directionsoutwardly from said pockets.

9. A railway truck comprising wheel-supported axles, side frames mountedon the axles at the inboard sides of the wheels, each side frame-havinga. bolster opening and a second opening at its top above the bolsteropening, a bolster supported by the side frames and having its endsextending into the bolster openings, said bolster having upstanding sidebearing tables extending through the second openings and guided by theside frames, each bearing table having pockets at opposite sidesthereof, converging inclined sur-* faces arranged in the pockets of eachbearing table, opposed friction wedges arranged in the pockets of eachbearing table and having inclined surfaces slidably engaging theinclined surfaces in the pockets of that hearing table, and springssupported by the bolster and engaging the wedges for urging them intoengagement with said side frames.

10. A railway truck comprising opposed wheelsupported side frames, theside frames being arranged at the inboard sides of the wheels and eachside frame having a bolster opening, a compression member on each sideframe, a spring plank having end portions extending through the bolsteropenings and connecting the side frames, a group of springs arranged ateach of the end portions of the plank and supported thereby, a bolstersupported by the springs and having its ends extending through thebolster openings, the center of pressure of each spring group beingpositioned outwardly of the longitudinal center line of the side frameat that side of the truck to provide increased lateral stability of thebolster on said springs each side frame having an opening in itscompression member located entirely within the lateral dimensions of thecompression member, and an upstanding side bearing table carried by eachend portion of the bolster extending upwardly through the openings inthe compression members of the side frames.

11. A railway truck side frame comprising, a top member, spaced bolsterguide columns depending from the top member, a spring seat joining thelower ends of the columns, said top member between the columnsconsisting of a pair of spaced recumbent channels, one of said channelsbeing relatively shallow and the other relatively deep to providetherebetween an opening positioned above the spring seat and off-settoward one side of the side frame, and tension members converging fromthe end portions of the side frame toward the columns and mergingtherewith.

12. In a structure of the character described, a bolster having near oneend thereof an upstanding side bearing table, the bolster and sidebearing table having oppositely disposed pockets positioned in oppositesides of the bolster and side bearing table, converging inclinedsurfaces arranged in the pockets,'friction wedges extending into thepockets and having inclined surfaces slidably engaging said convergingsurfaces, and springs arranged in the pockets and bearing respectivelyat one end against the bolster and at the opposite end against one ofthe friction wedges.

13; A side frame for a railway car truck comprising, acompressionmember, spaced guide columns depending substantially vertically from thecompression member, a spring seat including a top web arranged in onegenerally horizontal plane joining the lower ends of the guide columns,tension members inclined downwardly from the compression member inproceeding from opposite end portions of theside frame, said tensionmembers joining the guide columns about mid-way the height of saidcolumns to provide vertical portions of the guide columns between thelowermost portions of the tension members and the plane of the top webof the spring seat.

14. A side frame for a railway car truck comprising, a compressionmember, spaced guide columns depending substantially vertically from thecompression member, a spring seat including atop web arranged in onegenerally horizontal plane joining the lower ends of the guide columns,tension members inclined downwardly from. the compression member inproceeding from opposite end portions of the side frame, a web formingthe bottom of each tension member, said tension members joining theguide columns'at approximately the mid-portion of said columns toprovide vertical guide column portions between the bottom web of eachtension member and the plane of the top Web of the spring seat, and thebottom web of each tension member extending through the associated guidecolumn at an angle differing from the slope of its tension member andmerging with the top web of the spring seat.

15. A side frame for a railway car truck comprising, a compressionmember, spaced guide columns depending substantially vertically from thecompression member, a spring seat including a top Web arranged in onegenerally horizontal plane joining the lower ends of the guide columns,

tension members inclined downwardly from the compression member inproceeding from opposite end portions of the side frames, asubstantially straight web forming the bottom of each tension member,said tension members joining the guide columns at approximately themid-portion of the height of said columns to provide vertical guidecolumn portions between the bottom web of each tension member and theplane of the top Web or" the spring seat, the bottom web of each tensionmember extending through the associated guide column joining an end or"the top web of the spring seat, and said bottom webs within the guidecolumns each being arranged at a greater angle with respect to thecompression member than portions of the bottom webs outwardly of theguide columns.

16, A side frame for a railway car truck comprising, a compressionmember, spaced guide columns depending substantially vertically from thecompression member, a box section spring seat including a lower Web anda top web arranged in one generally horizontal plane joining the lowerends of the guide columns, tension members U-shaped in section inclineddownwardly from the compression member in proceeding from opposite endportions of the side frames, each tension member having a substantiallystraight bottom web, said tension members joining the guide columns atthe mid-portion of said columns to provide vertical guide columnportions between the bottom web 'of each tension member and the plane ofthe top web of the spring seat, the bot tom web of each tension memberextending through the associated guide columnat an angle diifering fromthe slope of its tension member and merging with the top web of thespring seat, and lower web of the spring seat extending upwardly at itsends to provide vertical portions joining the bottom webs of the tensionmembers above the plane of the top web of the spring seat.

17. A bolster for a railway car truck comprising, a medial portionhaving a relatively large depth measured vertically through the medialportion, a center plate carried by the top of the medial portion, an endportion relatively shallow in depth measured vertically of the bolsterjoining the medial portion about mid-way the height of the medialportion, an integral side bearing table projecting upwardly from theshallow end portion about mid-way the length of the shallow end portion,said side bearing tables extending upwardly and terminating above theplane of the center plate, and each side bearing table having twopockets therein one open at one side of the bolster and the other openat the other side of the bolster.

18. A side frame load bearing assembly for a railway car truckcomprising, a spring plank including a bottom web and a marginal flangeextending along and upwardly from each edge of the bottom web, bolstersupporting springs resting on the bottom web of the spring plank, a sideframe spring seat supporting said spring plank inwardly of the center ofpressure of said springs, an inturned bead integral with the top of eachflange, and said beads increasing in height and thickness in proceedingoutwardly from a central portion of the spring plank.

19. A side frame load bearing assembly for a railway car truckcomprising, a spring plank including a bottom web and a marginal flangeextending along and upwardly from each edge of the bottom web, bolstersupporting springs resting on the bottom web of the spring plank, a sideframe spring seat supporting said spring plank inwardly of the center ofpressure of said springs, and an inturned bead integral with the top ofeach flange with each bead increasing in thickness and in height inproceeding outwardly from the center of the spring plank and attaining amaximum height and thickness where the spring plank rests on the springseat.

20. A railway truck comprising, opposed wheelsupported side frames, saidside frames being arranged at inboard sides of the wheels, each sideframe having a bolster opening, a spring plank having end portionsextending through said bolster openings and connecting the side frames,a group of springs supported on each end portion of said plank, abolster supported by said spring groups and having its ends extendingthrough the bolster openings, the center of pressure of each springgroup being positioned outwardly of the longitudinal center of theassociated side frame to provide lateral stability of the bolster onsaid spring groups, each side frame having an opening in the topthereof, an upstanding side bearing table carried by each end of thebolster extending upwardly through the associated opening in the top ofeach side frame, and damping means mounted in said side bearing tablescooperating with the side frames to snub relative movement between thebolster and the side frames.

21. In a railway car truck, a compression member, spaced guide columnsdepending substantially vertically from said compression member. aspring seat including a top web arranged in a substantially horizontalplane joining lower ends of the guide columns, tension members connectedto and inclined downwardly from the compression member in proceedingfrom opposite end portions of the truck, said tension members joiningthe guide columns at approximately the mid-portion of theheight of saidcolumns to provide unobstructed areas under the tension members adjacentvertical portions of the guide columns, and said compression memberhaving an opening therein over said spring seat.

22. In a railway car truck, a compression member, spaced guide columnsdepending substantially vertically from said compression member, aspring seat including a top web arranged in a substantially horizontalplane joining lower ends of the guide columns, tension members connectedto opposite end portions of the compression memher, said tension memberssloping downwardly from the compression member in proceeding fromopposite end portions thereof, a substantially straight web forming thebottom of each tension member, said tension members joining the guidecolumns at approximately mid-portion of the height of said columns toprovide vertical guide column portions between the bottom web of eachtension member and the horizontal plane of the top web of the springseat, the bottom web of each tension member extending through theassociated guide column joining an end of the top web of the springseat, said webs within the guide columns each being arranged at agreater angle with respect to the compression member than portions ofthe bottom webs outwardly of the guide columns, and said compressionmember having an opening in the mid-portion thereof over said springseat.

23. In a bolster and friction shoe unit, a bolster, a medial portion onthe bolster having a. relatively large depth measured vertically throughthe medial portion, a center plate carried by the top of the medialportion, an end portion on the bolster of relatively shallow depthmeasured vertically of the bolster joining the medial portion aboutmid-way the height of the medial portion, an integral side bearing tableprojecting upwardly from the end portion about mid-way the length of theshallow end portion, said side bearing table extending upwardly andterminating above the plane of the center plate, said side bearing tablehaving two pockets therein one open at one side of the bolster and theother open at the other side of the bolster, inclined surfaces carriedby the bolster within said pockets, a friction shoe in each pockethaving a sloping surface for engaging the inclined surfaces in theassociated pocket, and springs engaging the bolster at one end and therespective friction shoes at the other end urging the shoes intoengagement with said inclined surfaces.

JAMES C. SETTLES. LOREE ELWYN FURNISS.

, REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,408,321 Wellman Feb. 28, 19221,457,345 Chiles June 5, 1923 1,555,561 Doerr Sept. 29, 1925 1,582,902Chiles May 4, 1926 1,652,808 Barrows Dec. 13, 1927 1,957,570 Wolfe May8, 1934 2,012,949 Drenning Sept. 3, 1935 2,162 307 Howat June 13, 19392,316,046 Buekwalter Apr. 6, 1943 2,366,957 Cottrell Jan. 9, 1945

